behalf
noun
as the agent of or on someone's part (usually expressed as `on behalf of' rather than `in behalf of')
“the guardian signed the contract on behalf of the minor child”
“this letter is written on behalf of my client”
for someone's benefit (usually expressed as `in behalf' rather than `on behalf' and usually with a possessive)
“in your behalf”
“campaigning in his own behalf”
Source: WordNet 3.1, Princeton University
